C44" (P0130/P0135) Ho2 Sensor (Ho2S) Circuit Malfunction (For E-02, 19, 24) - Suzuki VZ800 Service Manual

"C44" (P0130/P0135) HO2 SENSOR (HO2S) CIRCUIT MALFUNCTION
(FOR E-02, 19, 24)
DETECTED CONDITION
C44 HO2 sensor output voltage is not input
(P0130) to ECM during engine operation and
running condition.
(Sensor voltage
C44 The heater can not operate so that
(P0135) heater operation voltage is not supply to
the oxygen heater circuit.
ECM
E2
HO2S
HO2. H
INSPECTION
Step 1 (When indicating C44/P0130:)
1) Remove the right frame cover. (8-4)
2) Turn the ignition switch OFF.
3) Check the HO2 sensor for loose or poor contacts.
If OK, then check the HO2 sensor lead wire continuity.
4) Disconnect the HO2 sensor coupler
5) Check the continuity between W/Bl wire A and ground.
6) Also, check the continuity between W/Bl wire A and B/Br wire
B. If the sound is not heard from the tester, the circuit condi-
tion is OK.
 09900-25008: Multi-circuit tester set
 Tester knob indication: Continuity test ()
0.1 V)
B/Br
W/Bl
W/B
HO2 sensor
POSSIBLE CAUSE
• HO2 sensor circuit open or shorted to ground
• Fuel system malfunction
• ECM malfunction
• Battery voltage supply to the HO2 sensor
Engine stop Side-stand
switch relay
O/W
To GP
switch
1
1
FI SYSTEM 5-69
Ignition
switch